71 citations · 173 across the 12 of their papers we have counts for
13 papers
Local phase-space Berry curvature and Hall transport in textured twisted bilayer graphene
Tohid Farajollahpour
Slow twist-angle and heterostrain textures in twisted bilayer graphene provide a natural route to phase-space Berry geometry. We show that a purely geometric tetrad/shift sector do…
Parity-driven RKKY decoupling and anomalous Dzyaloshinskii-Moriya interaction in odd-parity magnets
Morteza Salehi, Tohid Farajollahpour
Unconventional odd-parity magnets, characterized by an odd-parity momentum-dependent spin splitting, offer a fundamentally distinct paradigm for non-collinear spintronics. Here, we…
Light-induced charge and spin Hall currents in materials with symmetry
Tohid Farajollahpour, R. Ganesh, Kirill Samokhin
Berry curvature, a momentum space property, can manifest itself in current responses. The well-known anomalous Hall effect in time-reversal-breaking systems arises from a Berry cur…
Synthetic non-Abelian gauge fields and gravitomagnetic effects in tilted Dirac cone systems
Tohid Farajollahpour, S. A. Jafari
In planar tilted Dirac cone systems, the tilt parameter can be made space-dependent by either a perpendicular displacement field, or by chemical substitution in certain systems. We…
Sound of Fermi arcs
Fatemeh Adivehvand, Zahra Faraei, Tohid Farajollahpour +1
Using Green's function of semi-infinite Weyl semimetals we find that the collective charge excitations of Fermi arcs in undoped Weyl semi-metals are linearly dispersing gapless pla…
Optical conductivity of triple point fermions
Alireza Habibi, Tohid Farajollahpour, S. A. Jafari
As a low-energy effective theory on non-symmorphic lattices, we consider a generic triple point fermion Hamiltonian which is parameterized by an angular parameter . We find stro…
The borophene sheet: A solid-state platform for space-time engineering
Tohid Farajollahpour, Zahra Faraei, S. A. Jafari
We construct the most generic Hamiltonian of the structure of borophene sheet in presence of spin-orbit, as well as background electric and magnetic fields. In addition to…
Greens function of semi-infinite Weyl semimetals
Zahra Faraei, Tohid Farajollahpour, S. A. Jafari
We classify all possible boundary conditions (BCs) for a Weyl material into two classes: (i) BC that mixes the spin projection but does not change the chirality attribute, and (ii)…
Topological phase transiton of anisotropic XY model with Dzyaloshinskii-Moriya interaction
T. Farajollahpour, S. A. Jafari
Within the real space renormalization group we obtain the phase portrait of the anisotropic quantum XY model on square lattice in presence of Dzyaloshinskii-Moriya (DM) interaction…
The role of the strain induced population imbalance in Valley polarization of graphene: Berry curvature perspective
Tohid Farajollahpour, Arash Phirouznia
Real magnetic and lattice deformation gauge fields have been investigated in honeycomb lattice of graphene. The coexistence of these two gauges will induce a gap difference between…
Anisotropic Friedel oscillations in graphene-like materials: The Dirac point approximation in wave-number dependent quantities revisited
T. Farajollahpour, S. Khamouei, S. Safari Shateri +1
Friedel oscillations of the graphene-like materials are investigated theoretically beyond the Dirac point-approximation. Numerical calculations have been performed within the rando…
Semiconductor of spinons: from Ising band insulator to orthogonal band insulator
Tohid Farajollahpour, S. A. Jafari
Within the ionic Hubbard model, electron correlations transmute the single-particle gap of a band insulator into a Mott gap in the strong correlation limit. However understanding t…
Emergence of electromotive force in precession-less rigid motion of deformed domain wall
T. Farajollahpour, N. Darmiani, A. Phirouznia
Recently it has been recognized that the electromotive force (emf) can be induced just by the spin precession where the generation of the electromotive force has been considered as…